THE PRACTICE STUDIO
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PRACTICE / Young double-slit experiment
How far apart are neighbouring bright fringes?
Coherent light of wavelength 600 nm illuminates two narrow slits 0.30 mm apart. A screen is placed 1.5 m from the slits.
What is the spacing between adjacent bright fringes near the centre?
Organize the givens & assumptions
- λ = 600 nm
- d = 0.30 mm
- D = 1.5 m
Equal-frequency coherent illumination, small angles, screen distance much larger than slit separation; use the ideal two-slit geometry.
- A
- B
- C
- D
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